Lizard-hipped (Saurischia), bird-hipped (Ornithischia). The difference between the two mainly lies in the structure of the girdle: lizard hip order girdle from the side is a three-shot type, the pubic bone in the lower part of the intestinal bone to the front, the sit bones are extended back, so the structure is similar to the lizard; very ugly. In the girdle of the order Ornithischia, the intestinal bones are greatly expanded both anteriorly and posteriorly, with a large anterior pubic eminence on the anterior side of the pubic bone extending below the intestinal bones, and the posterior side is even more greatly extended parallel to the sciatic bone extending anteriorly below the intestinal bones. The pelvis is therefore quadrangular when viewed from the side. (There are other distinctions besides.) The order Sauropoda is divided into Sauropoda (lizard-footed) and Theropoda (animal-footed). Sauropods are further divided into Proto-Sauropods and Theropods. Proto-sauropods mainly lived in the Late Triassic to the Early Jurassic, is a class of omnivorous - vegetarian medium-sized dinosaurs, such as the first giant dinosaurs living on Earth -------- plateosaurus, living in the early Jurassic Ankylosaurus. Sauropods lived mainly in the Jurassic and Cretaceous periods. The vast majority of them were giant vegetarian dinosaurs. The head was small, the neck was long, the tail was long, and the teeth were in the form of small spoons. Famous representatives of the lizard-footed suborder are produced in China's Sichuan, Gansu Late Jurassic by 19 cervical vertebrae consisting of a neck length of about half of the body length of the Mamenchisaurus, the world's largest known animal ----- seismosaurus or fragile double-chambered dragon and so on. Theropods lived from the Late Triassic to the Cretaceous. They were carnivorous dragons, walking on two feet, with sharp claws on the ends of their toes, and a well-developed head, for the most intelligent class. The mouth had dagger or knife-like sharp teeth. Tyrannosaurus rex is the famous representative, the rest, such as heterodontosaurus, the southern megalosaurus and so on are also quite famous. Ornithopoda is divided into five major groups: Ornithopoda, Stegosauria, Ankylosauria, Ceratopsia and Pachycephalosauria. Ornithopods are the most fossilized group of ornithischians, and indeed of the entire group of dinosaurs. It Dinosaurs
They walked bipedally or quadrupedally, had a separate premaxilla with teeth growing only in the cheeks, and the crowns of the maxillary teeth curved inward and those of the mandibular teeth curved outward. They lived from the Late Triassic to the Cretaceous, and were all vegetarian dinosaurs. For example: duck-billed dinosaur, avian dragon and so on. Stegosaurus, four-legged walking back with an upright bone plate, tail with two or more pairs of bony spurs, Stegosaurus mainly lived in the Jurassic to the Early Cretaceous period, is the first extinction of the dinosaur class of a large group. It is represented by the Stegosaurus, which is thought to have lived on the plains, and the Ken'sosaurus, which was discovered in Tanzania. Dinosaurs of the Arachnosauria group were low and stout, clad in bony armor, and fed on plants, mainly in the Early Cretaceous. Examples include the Hailarosaurus, which lived in continental Europe, the Spiny Beetle, which lived in the United Kingdom, and the Bautosaurus, which lived in the United States, and the Edmontosaurus, which lived in Mongolia. Ceratopsians, vegetarian dinosaurs that walked on four legs. Most of them lived in the late Cretaceous period, and the parrot-billed dinosaurs found in the north of China belonged to the ancestor type of horned dinosaurs. Among them are the Triceratops, which is the same name as Tyrannosaurus rex, the docile herbivore Protoceratops, and so on. Swollen head dragon class is mainly characterized by the skull is swollen thick, the sides of the hole is closed, the bone disk in the pubic bone by the sit bones are crowded, not involved in the composition of the girdle, mainly living in the Cretaceous period. Whether they were lizard-hipped or bird-hipped, their girdles left a small hole between the gut bone, the sit bones, and the pubic bone, a hole not found in all other orders of reptiles. It is this hole that indicates the closest kinship between the two orders of reptiles known as dinosaurs compared to all other orders.
Specific species
(as of 2003) Early Cretaceous - Early Cretaceous - Eoraptor Klamelisaurus Allosaurus Zephyrosaurus Primate ( Hypsilophodon) Iguanodon) Muttaburrasaurus) Ouranosaurus) Equijubus) Altirhinus) Nanyangosaurus) Lurdusaurus Kangnasaurus Valdosaurus Fukuisaurus Jinzhousaurus Tenontosaurus Probactrosaurus Dinosaurs
Raellynasaurus ( Leaellynasaura) Atlascopcosaurus Siluosaurus Qantassaurus Fulgurotherium Jeholosaurus Thecospondylus Xuanhuasaurus Stenopelix Zuniceratops Archaeoceratops Chaoyangsaurus Liaoceratops Hongshanosaurus Wuerhosaurus Katsuyamakensaurus Nurosaurus Jobaria Ultrasaurus Asiatosaurus Augustinia Mongolosaurus Mongolosaurus Nigersaurus Histriasaurus Rayososaurus Rebbachisaurus Limaysaurus Amargasaurus Amazonsaurus Kusatsura (Amazonsaurus Pukyongosaurus Jiangshanosaurus Chondrosteosaurus Aragosaurus Pelorosaurus Australopithecus Ornithopsis Venenosaurus Astrodon Eucamerotus Pleurocoelus Sonorasaurus Sauroposeidon Cedarosaurus Cedarosaurus Cedarosaurus Aepisaurus Algoasaurus Clasmodosaurus Iuticosaurus Chubutisaurus Macrurosaurus Tangvayosaurus Bwannon Bwannon Bwannon Bwannon Bwannon Bwannon Bwannon Bwannon Bwannon Bwannon Bwannon Bwannon Bwannon Tangvayosaurus Phuwiangosaurus Paralititan Gobititan Andesaurus Cretaceous Recovery
Malawisaurus Altispinax Calamospondylus Capitalsaurus Embasaurus Inosaurus Kagasaurus Katsuyamasaurus Wakinosaurus Walgettosuchus Clarke's Crocodile Walgettosuchus Kelmayisaurus Prodeinodon Spinostropheus Ligabueino Becklespinax Valdoraptor Erectopus African hunter-dragon Erectopus Afrovenator Tugulusaurus Siamosaurus Cristatusaurus Baryonyx Suchomimus Irritator Angaturama Fukui Angaturama Fukuiraptor Acrocanthosaurus Dwarfallosaur Neovenator Carcharodontosaurus Giganotosaurus Bahariosaurus Baryonyx Daryonyx Bahariasaurus Chilantaisaurus Calamosaurus Ginnareemimus Harpymimus Heptasteornis Phaedrolosaurus Phaedrolosaurus Colorado Phaedrolosaurus Kakuru Arkansaurus Nqwebasaurus Nedcolbertia Santanaraptor Scipionyx Yaverlandia Yaverlandia Aristosuchus Sinosauropteryx Huaxiagnathus Mei Mirischia Protarchaeopteryx Timimus Yixianosaurus (Yixianosaurus Microvenator Caudipteryx Microraptor M.gui Sinornithosaurus Dilong Eotyrannus Siamotyrannus Siamotyrannus Eotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Siamotyrannus Tonouchisaurus Sinornithoides Sininovenator Sinusonasus Archaeornithomimus Shenzhousaurus Shenzhousaurus Sinornithosaurus Sinornithosaurus Sinornithosaurus Sinornithosaurus Sinornithosaurus Sinornithosaurus ) Sanchusaurus Pelecanimimus Incisivosaurus Rapator Ornithodesmus Utahraptor Deinonychus Graciliraptor Graciliraptor) Alxasaurus Achillobator Beipiaosaurus Protopteryx Unenlagia Anchiornis Late Cretaceous ---Late Late Cretaceous --- Carnosaurus Coeluroides Mifunesaurus Newtonsaurus Quilmesaurus Sidormimus Sigilmassasaurus Sigilmassasaurus Tsuchikurasaurus Genusaurus Compsosuchus Dryptosauroides Genyodectes Jubbulpuria Ornithomimoides Ornithomimoides Ilokelesia Laevisuchus Rugops Noasaurus Masiakasaurus Velocisaurus Velociraptor Betasuchus Ostracoda (Betasuchus Xenotarsosaurus Tarascosaurus Indosuchus Abelisaurus Majungasaurus Aucasaurus Carnivorous Bovine Dragon Carnotaurus Indosaurus Orthogoniosaurus Majungatholus Rajasaurus Unquillosaurus Spinosaurus Deltadromeus Anninosaurus Anisaurus Deltadromeus) Aniksosaurus) Bagaraatan) Archaeornithoides) Bradycneme) Diplodocus) Diplotomodon) Elopteryx) Labocania ) Ricardoestesia Euronychodon Paronychodon Avimimus Dryptosaurus Shanyangosaurus Rahonavis Futabasaurus Futabasaurus Eterosaurus Eterosaurus Eterosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Eternosaurus Futabasaurus Itemirus Alectrosaurus Chingkankousaurus Deinodon Alioramus Albertosaurus Gorgosaurus Posterior curved tooth Gorgosaurus Aublysodon Nanotyrannus Stygivenator Dinotyrannus Shanshanosaurus Daspletosaurus Tyrannosaurus Tyrannosaurus Tyrannosaurus T. rex Tarbosaurus T. Luanchuanensis Araucanoraptor Borogovia Ostrichosaurus Tochisaurus Byronosaurus Lepidosaurus Saurisaurus Lepidosaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurisaurus Saurornithoides Troodon Stenonychosaurus Deinocheirus Orcomimus Garudimimus Gallimimus Anserimimus Anserimimus Anserimimus Dromiceiomimus Ornithomimus Struthiomimus Sinornithomimus Nomingia Heyuannia Caenagnathus Caenagnathus Caenagnathus Caenagnathus (Caenagnathasia) Chirostenotes (Chirostenotes) Elmisaurus (Elmisaurus) Citipati (Citipati) Conchoraptor (Conchoraptor) Ingenia (Ingenia) Khaan (Khaan) Oviraptor (Oviraptor) Avalanche (Avalanche) Oviraptor Alvarezsaurus Patagonykus Mononykus Parvicursor Shuvuuia Achillobator Adasaurus Bambiraptor Bambiraptor (Bambiraptor Koreanosaurus Megaraptor Pyroraptor Variraptor Atrociraptor Dromaeosaurus Some dinosaurs had feathers, such as Bambiraptor.
Saurornitholestes Erliansaurus Neimenggusaurus Lazyclaw Nothronychus Enigmosaurus Necrosaurus Nanshiungosaurus Nanshiungosaurus Segnosaurus Therizinosaurus Notohypsilophodon Bugenasaura Thescelosaurus Talenkauen Orodromeus Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus Orodromeus Parksosaurus Lophorhothon Rhabdodon Mochlodon Zalmoxes Onychosaurus Ornithomerus Oligosaurus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Gaspardus Oligosaurus Gasparinisaura Loncosaurus Anabisetia Bihariosaurus Pararhabdodon Planicoxa Craspedodon Craspedodon Hypsibema Hironosaurus Mandschurosaurus Orthomerus Secernosaurus Protohadros Claosaurus Gilbert's Dinosaur Gilmoreosaurus Telmatosaurus Arstanosaurus Gadolosaurus Pteropelyx Eolambia Bactrosaurus Tsingtaoosaurus Tsintaosaurus Kajon Tsintaosaurus Charonosaurus Parasaurolophus Nipponosaurus Amurosaurus Jaxartosaurus Lambeosaurus Fan-crowned swanosaurus Olorotitan Bathsheba Olorotitan Barsboldia Corythosaurus Hypacrosaurus Hadrosaurus Microhadrosaurus Kerberosaurus Shuangmiaosaurus Shuangmiaosaurus Thespesius Brachylophosaurus Maiasaura Aralosaurus Gryposaurus Kritosaurus Kritosaurus Anatotitan Edmonton Anatotitan Edmontosaurus Shantungosaurus Tanius Prosaurolophus Saurolophus Tianzhenosaurus Psittacosaurus Chinese psittacosaurs Psittacosaurus Psittacosaurus Chinese Psittacosaurus (P.sinen) Psittacosaurus meileyingensis Brachypodosaurus Pachycephalosaurus Stygimoloch Microcephale Dinosaurus Stygimoloch Microcephale Dinosaurus Stygimoloch Dinosaurus Stygimoloch Dinosaurus Dinosaurus Dinosaurus Stygimoloch Dinosaurus Dinosaurus Dinosaurus Stygimoloch Dinosaurus Dinosaurus Dinosaurus Dinosaurus Dinosaurus Dinosaurus Dinosaurus Dinosaurus Microcephale Gravitholus Prenocephale Tylocephale Sphaerotholus Stegoceras Homalocephale Ornatotholus Micropachycephalosaurus Goyocephale Wannanosaurus South Indian Dravidosaurus Qinlingosaurus Hisanohamasaurus Megacervixosaurus Megacervixosaurus Sugiyamasaurus Aegyptosaurus Campylodon Campylodoniscus Borealosaurus Huabeisaurus Ampelosaurus Ampelosaurus Gaoxiong (Ampelosaurus Hypselosaurus Jainosaurus Magyarosaurus Pellegrinisaurus Epachthosaurus Argentinosaurus Lirainosaurus, Antarctosaurus, Bonitasaura, Laplatasaurus, Nemegtosaurus, Quaesitosaurus, Rapetosaurus. Alamosaurus Argyrosaurus Titanosaurus Isisaurus Rinconsaurus Aeolosaurus Gondwanaatitan Opisthocoelicaudus Opisthocoelicaudia Neuquensaurus Rocasaurus Saltasaurus Otogosaurus Taveirosaurus Domeykosaurus Notoceratops Notoceratops Notoceratops Torosaurus Plateosaurus Tianshanosaurs Anchisaurus Mamenchisaurus Seismosaurus Apatosaurus Apatosaurus Brachiosaurus Carnotaurs (Apatosaurus Brachiosaurus Euhelopus Stegosaurus Kentrusaurs Chialingosaurus Huayangsaurs Tuojiangosaurus Athletes Tuojiangosaurus Scelidosaurus Hylaeosaurus Acanthopholis Gastonia Stegopelta Vertebrae Tyreophorus Glyptodontopelta Glyptodontopelta) Hoplitosaurus Polacanthus Sauroplites Gobisaurus Shamosaurus Minmi Tianchiisaurus Cedar Cedarpelta Ankylosaurus Heishansaurus Peishansaurus Priconodon Rhadinosaurus Stegosaurides Palaeoscincus Clawed Clawed Claw Palaeoscincus Pawpawsaurus Sarcolestes Anoplosaurus Odosaurids Nodosaurus Hylaeosaurus Struthiosaurus Neotropicus Struthiosaurus Niobrarasaurus Texasetes Animantarx Edmontonia Silvisaurus Panoplosaurus Tatenosaurus Sauropelta White Mountains Sauropelta Tsagantegia Maleevus Shanxia Talarurus Syrmosaurus Amtosaurus Nodocephalosaurus Polacanthus Polacanthus Dolichosaurus Polacanthus Tarchia Saichania Euoplocephalus Pinacosaurus Crichtonsaurus Ceratops Trachodon Turanoceratops Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Lepidoptera Leptoceratops Prenoceratops Asiaceratops Microceratops Graciliceratops Udanoceratops Bainoceratops Lakeshore Dinosauria Bainoceratops Kulceratops Ceratops Chasmosaurus Polyonax Ugrosaurus Pentaceratops Anchiceratops Arrhinoceratops Arrhinoceratops Torosaurus Diceratops Triceratops Pachyrhinosaurus Achelousaurus Monoclonius Brachyceratops Wildebeests Brachyceratops Einiosaurus Styracosaurus Centrosaurus Avaceratops Agathaumas Dysganus Arrhinoceratops Bachyrhinosaurus Weak horns ) Bagaceratops Lamaceratops Platyceratops Breviceratops Protoceratops Magnirostris Echizensaurus Montana Montanoceratops